JP4138926B2 - Work clamp device for plate processing equipment - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a work clamp device for a plate material processing apparatus.
[0002]
[Prior art]
As a prior art document related to the present invention, there is JP-A-7-178583 which is the invention of the present applicant.
[0003]
Japanese Patent Laid-Open No. 7-178583 discloses a work clamp 100 as shown in FIG. The workpiece clamp 100 clamps a workpiece W placed horizontally on a machining table 151 of a laser beam machine 150 as shown in FIGS. 7 and 8, for example, and is provided horizontally on a clamp base 153 of the workpiece table 151. is there.
[0004]
[Problems to be solved by the invention]
The workpiece clamp 100 includes a clamp jaw 103 that presses the workpiece W, a clamp base 105 that places the workpiece, a slide base 107 that supports the clamp base 105, a hydraulic cylinder 111 that pushes up the clamp jaw 103, and a clamp jaw. 103, and a link 113 for connecting the clamp base 105 and the like.
[0005]
In order to clamp the workpiece W with the clamp 100, it is natural that the workpiece W is placed horizontally on the workpiece table 151, pulled into the workpiece clamp 100, and moved to the X-axis stopper provided on the machining table 151. is there.
[0006]
In this case, if the size of the workpiece W is a certain size, the operator can place the workpiece W on the workpiece table 151 with both hands and move the workpiece W to the clamping position.
[0007]
However, when the size increases, it is necessary to suspend the work using a crane or a forklift and place it on the table.
[0008]
When the workpiece is suspended, the center or both ends of the workpiece hang down due to its own weight regardless of the thickness of the workpiece, so that it is very difficult to place the workpiece on the work table and is a dangerous operation.
[0009]
Even when the work is placed on the work table by the above-described means, in the case of a large-sized or thick work, it is a work that requires a lot of labor to move the work to the clamping side manually. Therefore, usually, it is necessary to provide a work pressing means 155 of a pneumatic or hydraulic mechanism called a work pusher, and to push the work between the upper clamp jaw 103 and the clamp base 105, which increases the cost of the machine, It has also become a factor of reduced reliability.
[0010]
In order to use the above-mentioned work pressing means 155, it is necessary to provide a number of free bears 157 (free stroke bearings) on the work table 151 for supporting and moving the work W lightly. However, during the laser processing, the free bear 157 is exposed to laser light or spatter, so that it is very hard to maintain.
[0011]
The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a workpiece clamping device for a plate material processing apparatus that can easily clamp a workpiece having a large weight or a workpiece having a large size. That is.
[0012]
[Means for Solving the Problems]
As a means for solving the above-mentioned problem, the work clamping device of the plate material processing apparatus according to claim 1, wherein the work clamping device of the plate material processing device includes a reference positioning means for setting a reference position in the Y-axis direction of the workpiece. A clamp base is provided on the work table of the plate material processing device, and a lower clamp nail provided with a movable work insertion guide is provided on the clamp base to be rotatable, and the lower clamp nail cooperates with the lower clamp nail to grip the workpiece. A movable upper clamp nail is provided, and the lower clamp nail and the upper clamp nail are provided on the clamp base so as to be rotatable from a horizontal position to a vertical position, and when the lower clamp nail is in the vertical position, the movable work insertion guide Fixed work insertion guide that guides the work between the upper and lower clamp nails Wherein provided on the clamp base, said reference positioning means is to the subject matter that the abutting work was readily movable rotatable roller in the X-axis direction to the reference positioning means.
[0013]
Therefore, a large and heavy workpiece is suspended vertically and attached to the workpiece clamp device, and the workpiece clamp device with this workpiece mounted is rotated horizontally and placed on the work table of the plate material processing device. Can be placed. In addition, it is easy to move the workpiece inserted and placed on the roller of the reference positioning means of the workpiece clamping device in the X-axis direction of the plate material processing device and abut against the reference stopper in the X-axis direction .
[0016]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings. FIG. 5 shows an example of the laser processing machine 1 equipped with the work clamp device 30 of the plate material processing apparatus according to the present invention.
[0017]
The laser beam machine 1 includes a bed 3 extending in the front-rear direction (X-axis direction), and an X-axis guide rail 5 extending in the X-axis direction is laid on the bed 3.
[0018]
On the guide rail 5 is provided a work table 7 that can be moved and positioned in the X-axis direction by a drive motor, a ball screw, a ball nut, and the like (not shown). On one side of the work table 7 (right side in the X-axis direction in FIG. 5), a work clamp device 30 is provided at an appropriate interval.
[0019]
A gate-shaped frame 11 is erected over the bed 3. A Y-axis guide rail 13 extending in the left-right direction (Y-axis direction) is provided on the front side of the beam portion 11a of the portal frame 11, and a drive motor (not shown) is provided on the Y-axis guide rail 13. A Y-axis carriage 15 that can be moved and positioned in the Y-axis direction by a ball screw, a ball nut, or the like is provided.
[0020]
The Y-axis carriage 15 incorporates an optical system (not shown) for condensing and irradiating a laser beam from a laser oscillator (not shown) onto the work W placed on the work table 7. Is provided.
[0021]
The work table 7 and the laser machining head 17 are controlled by a known NC control device 21 provided on the frame 11 via a bracket 19.
[0022]
As shown in FIGS. 4 and 5, a work clamp device 30 is attached to one side of the work table 7 at an appropriate interval. Next, details of the work clamp device 30 will be described.
[0023]
1 to 4, a clamp base 33 is attached to a frame 31 on one side of the work table 7 at an appropriate interval. Hinge blocks 35 are attached to both ends of the clamp base 33 in the X-axis direction, and a lower clamp nail 41 having a movable work insertion guide 39 is rotatably fitted to a rotary shaft 37 fitted to the hinge block 35. Yes.
[0024]
As well shown in FIG. 1, the movable work insertion guides 39 are provided on both sides of the lower clamp nail 41 in the X-axis direction, and the upper work insertion guides are arranged at the upper end of the lower clamp nail 41 ( Alternatively, it is protruded from the tip. Further, a protruding portion 43 protruding rightward is formed at a substantially central portion of the lower clamp nail 41, and this protruding portion 43 extends to the inside of a hole 47 provided substantially at the center of the upper clamp nail 45. I'm allowed.
[0025]
The upper clamp nail 45 is pivotally supported on a rotation shaft 49 fitted to the protrusion 43 so that an appropriate angle range can be rotated. A cylinder 50 is formed at the lower center of the upper clamp nail 45, and a piston rod 55 of a piston 53 incorporated in the cylinder 50 protrudes from the cylinder so as to be able to contact the lower end of the lower clamp nail 41. I'm allowed.
[0026]
In the above configuration, when the pressurized fluid from the pneumatic or hydraulic source (not shown) is supplied from the pressurized fluid supply port 51 provided on the cylinder head side of the cylinder 50, the tip of the upper clamp nail 45 becomes the lower clamp. It rotates in the direction of the tip of the nail 41 (counterclockwise). Therefore, the workpiece W can be pinched or grasped between the upper and lower clamp nails.
[0027]
If the supply of pressurized fluid to the cylinder 50 is stopped, the tip of the upper clamp nail 45 rotates clockwise by the elastic force of the spring 57 inserted between the piston rod side of the piston 53 and the cylinder 50. As a result, the held workpiece W can be released.
[0028]
As shown in FIG. 1, when the lower clamp nail 41 is rotated clockwise about a rotation shaft 37 and rotated from a horizontal position to a vertical position, a movable work formed on both sides of the lower clamp nail 41 is formed. A fixed workpiece insertion guide 59 is provided on the clamp base 33 to guide the workpiece W between the upper and lower clamp nails 41, 45 so as to face the insertion guide 39.
[0029]
As shown in FIG. 1, a locking portion 61 that locks the back of the lower end of the lower clamp nail 41 is provided on the left side of the clamp base 33 so that the lower clamp nail 41 stops in a vertical position.
[0030]
A positioning means 63 for setting a reference position in the Y-axis direction of the workpiece W is provided between the upper and lower clamp nails 41 and 45. The positioning means 63 is provided with a roller pin 67 on the lower clamp nail 41, and a roller bearing 65 is attached to the roller pin 67. Therefore, it is possible to set the reference position in the Y-axis direction of the workpiece W that contacts the roller bearing 65 and to easily move the workpiece W in the X-axis direction.
[0031]
In a plate material processing apparatus equipped with the work clamp device 30 of the plate material processing apparatus having the above configuration, for example, the laser processing machine 1 as shown in FIG. The operation for doing this will be described.
[0032]
As shown in FIG. 4, first, the upper and lower clamp nails of the work clamp 30 are set upward (vertical direction). Next, using a crane or a forklift (not shown), the workpiece W is suspended vertically and moved above the workpiece clamping device 30. Thereafter, the crane is gradually lowered, and the lower end of the workpiece W is gradually lowered between the workpiece insertion guides 39 and 59.
[0033]
The lower end of the work W is guided by the work insertion guides 39 and 59 and enters between the upper and lower clamp nails, and comes into contact with the roller bearing 65 of the positioning means 63 for setting the Y-axis reference and stops.
[0034]
Next, in the above state, the crane is moved in the X-axis direction until the side end of the workpiece comes into contact with the X-axis reference stopper (not shown). Then, the positioning is completed when the workpiece W hits the X-axis reference stopper. After that, when pressurized fluid such as compressed air is supplied to the supply hole 51 of the cylinder 50, the piston 53 protrudes from the cylinder 50 against the elastic force of the spring 57, and the upper clamp nail 45 is rotated. The workpiece W is pivoted counterclockwise about the shaft 49, and the workpiece W is strongly clamped between the upper and lower clamp nails 45 and 41.
[0035]
Next, when the crane is further lowered in the above-described state and moved slightly in the Y-axis direction, the upper and lower clamp nails 45 and 41 of the work clamping device are integrally rotated counterclockwise about the rotary shaft 37 as an axis. It rotates and the workpiece | work W can be mounted in the fixed position on a workpiece | work table.
[0036]
【The invention's effect】
According to the first aspect of the present invention, in the workpiece clamping device of the plate material processing apparatus, the workpiece insertion port of the workpiece clamping device is provided so as to be rotatable from the horizontal position to the vertical position. In addition, by using a lifting machine such as a crane, the workpiece can be placed in a vertical state, safely mounted on the workpiece clamping device, and placed on a predetermined position on the processing table of the plate material processing device. In addition, it becomes easy to move the workpiece inserted and placed on the roller of the reference positioning means of the workpiece clamp device in the X-axis direction of the plate material processing device and abut against the reference stopper of the feed shaft.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of a left side surface of a work clamp device of a plate material processing apparatus according to the present invention.
FIG. 2 is a front view of a work clamp device of a plate material processing apparatus according to the present invention.
FIG. 3 is an exploded view of a work clamp device of a plate material processing apparatus according to the present invention.
FIG. 4 is a diagram for explaining the operation of the work clamp device of the plate material processing apparatus according to the present invention.
FIG. 5 shows an example of a laser processing machine equipped with a work clamp device of a plate material processing apparatus according to the present invention.
FIG. 6 is a work clamp of a conventional plate material processing apparatus.
FIG. 7 is a plan view of a laser processing machine equipped with a work clamp of a conventional plate material processing apparatus.
8 is a front view of FIG. 7. FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Laser processing machine 3 Bed 5 Guide rail 7 Work table 11 Portal frame 13 Guide rail 15 Y axis carriage 17 Laser processing head 19 Bracket 21 NC control device 30 Work clamp device 31 Frame on one side of table 7 Clamp base 35 Hinge Blocks 37 and 49 Rotating shaft 39 Movable workpiece insertion guide 41 Lower clamp nail 43 Projection 45 Upper clamp nail 47 Hole 50 Cylinder 51 Supply hole 53 Piston 55 Piston rod 57 Spring 59 Fixed workpiece insertion guide 61 Locking portion 63 Positioning means 65 Roller Bearing 67 Roller pin

Claims (1)

In the work clamping apparatus of the plate material processing apparatus provided with the reference positioning means for setting the reference position of the workpiece in the Y-axis direction , a clamp base is provided on the work table of the plate material processing apparatus, and a movable work insertion guide is provided on the clamp base. A lower clamp nail is provided so as to be rotatable, and an upper clamp nail is provided on the lower clamp nail so as to be able to grip a workpiece in cooperation with the lower clamp nail. The clamp base is provided with a fixed work insertion guide which is provided so as to be rotatable from a vertical position to a vertical position and guides a work between the upper and lower clamp nails in cooperation with the movable work insertion guide when the lower clamp nail is in the vertical position. Wah provided, wherein the reference positioning means abuts to the reference positioning means The workpiece clamping device of the plate material processing apparatus is characterized in that a readily movable rotatable roller in the X-axis direction.

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